Strong
Basalt is extremely durable, resistant to craking, resistant to rust, and light.

Safety
Because of the inert nature of basalt, it is NOT a carcinogen. Also, Ecozai Basalt fiber which we sell, is between 9 and 16 micrometers in diameter, which is too large to be an inhalant risk. Basalt also causes significantly less skin irritation. ( No itchy ).